Small Stick, Massive Sound. The Dyna Stick is a 1.5-inch individually fused firecracker. It is designed for maximum concussive force relative to its size. Because they are individually fused (rather than on a string), they are meant to be used one by one, giving you total control over the timing of each “bang.” They are famously waterproof, meaning the fuse will continue to burn even in damp conditions. Ex. (rain/humidity)